Metal sharpening machine



March 2 1, 1933. H, J. GAISMAN METAL SHARPENING MACHINE s Sheets-Sheet 1 Filed April 11 1929 INVENTOR BY Mwm' 2" (3m ATTORNEY March 21, 1933. H. J. GAISMAN METAL SHARPENING MACHINE 5 Sheets-Shet 2 ATTORNEY INVENTOR BY Filed April 11 March zl, 1933. GNSMAN METAL SHARPENING MACHINE Filed April 11; 1929 5 Sheets-Sheet 3 INVENTOR A J, gm

ATTORNEY Fig. 1 1 is an edgeview of Fig. 13, and

Patented Mar. 21, 1933 umrsn STATES HENRY J. GAIQSMALVN', OF NEW YORK, N. Y., ASSIGNORQIBY Mnsim ASSIGNMENTS, 'ro

GILLETTE SAFETY RAZOR COMPANY, TION OF DELAWARE OF BOSTON, MASSACHUSETTS, CORPORA- METAL SHARPENING MACHINE Application filed April 11,

This invention has reference to improvements in machines of the class in which continuous lengths of metal strips are propelled and their edges are sharpened while they travel lengthwise.

An object of the invention is to provide improved means to support and guide ground edge portions or facets of the strip in proximity to sharpening means, to resist edgewise thr'ustsor pressure of the sharpening means against the strip without injury to the sharpened edges of the latter and to resist lateral pressure of the sharpening means against the strip. I

Another object is to provide movable guiding means for the ground portions of the strip without engaging the sharpened edges of the latter, which movable means will accommodate itself to any variation in the width of the latter.

The invention comprises novel details of improvement that will be more fully hereinafter set forthand then pointed out in the claims.

Reference is to be had to the accompanying drawings, in which,

Fig. 1 is a plan view illustrating a machine embodying this invention; Fig; 2 is a side view of Fig. 1, partly in section;

Fig. 3 is an enlarged detail side view, partly in section;

Fig. 3a is a section on line 3a, 3a in Fig. 3;

Fig. 4 is a section on line 4, 4 in Fig. 3; Fig. 5 is a section on line 5, 5, in Fig. 3;

Fig. 6is an enlarged detail of part of Fig. 5;

Fig. 7 is an enlarged detail plan view of part of Figs. 1 and 3; I

Fig. Sis a cross section on line 8, 8 in Fig. 3;

Fig. 9 is an enlarged detail of part of Fig.

Fig. 10 is a section on line lO, 10 in Fig. 3;

Fig, 11 is a side view of movable stripguiding means;

Fig. 12 is an edge view of Fig. 1;

Fig. 13 is a view similar toFig. 11, illustrating a modification;

1929. Serial No. 354,421. r V V Fig. 15is an enlarged'section on line 15,15

in F1g.,13. v Similar numerals of reference indicate corresponding parts in'the several views.

The main frame 1 of themachine may be :of any suitable construction. At 2 is indicated a strip of metal to be sharpened,'which may be supplied from a coil in a' wellknown way. Grinding wheels or disks 3 and4= carried by shafts journaled inbrackets 5 and'6 on the main frame are adapted to grind 0pposite sides of one edge portion of strip 2. Grinding wheel or disks 7 and 8 carried by shafts journaled in brackets 9 and 10 are adapted to grind opposite sidesof the other or upper edge portions of strip 2. Said wheels or disks may be rotated by belts 11 and pulleys 12 from a power shaft 13. The

means described are adapted to rough-grind the natural edge portions of strip 2, providing beveled facets thereon. vAdjacent to the wheel or disk 3 the strip 2 is guided in a space 1% shown formed between the bracket member 50 and a guide 15, the upper edge of the strip bearing against a hardened guide block 16, (Fig. 4). Adjacent to the wheel or disk 7 the strip 2 isguided in a space-17 shown formed between the bracket member 9a and a guide 18, the lower sharpened edge of the strip bearing against a hardened guide block 19 having a longitudinal groove 20, of such dimensions as-to engage the ground beveled edge portions or facets of strip 2, to guide the latter, and to keep the sharpened edge of the strip out of contact with the'guide block 19,

(Figs. 5 and 6). The guide blocks 16 and 19 resist the thrusts or pressure of the corresponding wheels or disks 3 and 7 as rotated in the direction of the arrows in Figs. 4 and 5. 7

As the sharpened strip 2 passes from the last grinding wheels or disks 7 and 8 said strip is supported and guided by a grooved support 21, shown in the form of a grooved roller, movably carried to accommodate variations in the width of strip 2, (Figs. 2, 3 and 3a). on a pivot 22 supported by an arm 23that is pivoted at 24 on a block 32 carried by the support (Fig. 10), which support is 7 fastened on the upright wall 25 of casingv 4:4,

PATENT rica in The roller 21 is shown carried (Fig. 7). The roller 21 is located adjacent to a sharpening wheel or disk 26, and said roller 21 guides the strip at its lower ground edge to said wheel 26. The wheel 26 is shown carried by a shaft 27 ournaled in a support 28 on the main frame, which shaft may be rotated by a belt 29 from a pulley 30 on shaft 13, (Fig. 2). On the side of wheel 26 opposite the roller 21 is another grooved guiding roller 21, similar to roller 21, and engaging the sharpened edge portions or facets of the strip 2 that pass from the wheel 26, (Fig. The roller 21 is pivoted at 22 on an arm 23 that is pivoted at 24 on the block 32. The rollers 21 and 21' engage the beveled edge portions or facets of strip 2 without engaging the sharpened edge of the latter, and keep the lower edge of the strip in position'to be engaged by the sharpening or honing disk 26, resisting lateral thrust or pressure of the latter. The rollers 21 and 21 are resiliently pressed toward the edge portion of strip 2 by springs 31 and 31 respectively engaging the arms 23 and 23 as well as the -block 32, (Fig. 3), so as to accommodate the rollers to unevenness in the edge portion of the strip. Spaced from and in opposition to the wheel or disk 26 the block 32 is carried by the support 25', and the portion of strip 2 between its sharpened edges slides alon a flat face portion 33 of said block, (Figs. 8 and On the outer face of block 32 is secured a guiding plate 34, the portion 34 of which is spaced from the block 32, at 35, in which space the strip 2 slides with its sharpened edges out of contact with the block and the plate, (Fig. 8). Screws 36 secure plate 34 to block 32. Grooved rollers 37 are journaled on pins 38 carried by block 32, which rollers are located in space 39 between block32 and plate 34, (Fig. 8). The grooves .of the rollers 37'receive the beveled edge portions or facets of the upper portion of the groiuid strip 2 to guide the latter, and the grooves in the rollers prevent the sharpened edge of the strip from engaging the rollers. Adjacent to the rollers 37 a strip guide 34a is secured toblock 32 by screws 40, and a space 41 is formed between the block 32 and guide 34a, said space being so arranged that the sharpened ed e of the strip will not engage said guide, (Fig. 10). The guide 34a is shown located adjacent to the midportion of wheel or disk 26 and the rollers 37 are shown located at one side of the said guide, (Fig. 3).

At 37 are other grooved rollers, similar to rollers 37, journaled on block 32 on the side of disk 26 opposite to the rollers 37 (Fig. 3). The rollers 37 engage the upper beveled edge portions or facets of strip 2 after the'disk 26 has operated upon the same, without engage ment of the sharpened edge of the strip with said rollers 37 in manner similar to the rollers 37. The block 32 is centrally pivoted on a pin 41 carried by the support .25 said block being located in a recess 42 in said support (Figs. 8 and 10). Screws 43 carried by the casing 44 are adapted to be set respecting block 32, without engaging it, on opposite sides of its pivot 41, whereby the block with the parts carried thereby may swing angularly with respect to the plane of strip 2 as the latter is engaged by sharpening or honing disk 26. The pivotal strip carrying block 32, the strip guiding means and the sharpening disk or wheel are maintained in perfect alignment with respect to each other. The disk 26 and parts asociatcd therewith are enclosed in casing 44. Since the disk 26 operates along one side edge portion or facet of strip 2 another disk or wheel 26, of the same character as disk 26, is located a distance along the strip, and a guide and grooved wheels are associated with the disk 26 in manner described with respect to the disk 26, for sharpening the corresponding other lower edge portion or facet'of thestrip, (Fig. 1). In order to sharpen or hone the upper edge portions or. facets of the strip 2 additional wheels and their associate parts, corresponding to the disks 26 and 26, may be located along the frame, to the left of disk 26, (Figs. 1 and 2).

Suitable propelling means for causing continuous travel of thestrip 2 through the machine while being sharpened may be provided. At 45 and 46, (Figs. 1 and 2), are located spaced feed-rolls for the strip 2, engaging opposite sides of the latter in a well known way, said rolls being suitably geared .2:

together, the shaft of roll 46 being driven by a worm wheel 47 operated by a worm 48 driven by chain 49 from sprocket wheel 50 on shaft 13.

In order to guide the sharpened strip 2 from the sharpening devices to the feed-rolls 45 and 46', without injury to the sharpened edges of the strip, movably supported guide rollers 51 and 52 are provided, (Figs. 1, 2, 11 and 12). grooves in which the sharpened edges of the strip are received, the beveled edge portions or facets of the strip being engaged by the rollers without the sharpened edges of the Strip engaging id rollers, (Fig. 12). Said 1;:

rollers are supported by pivots 53 and 54 carried by an arm 55, with the rollers located on opposite sides of strip 2. The arm 55 is centrally pivoted at 56, with the axis of the rollers at equal distances from said pivot, on a support or bracket 57 carried by the main frame. A spring 58, operative with arm 55 and with the support 57, normally tends to resiliently press the rollers 51 and 52 against the strip 2, to guide the latter in a vertical or edgewise direction while traveling to the feed rolls to keep the strip properly positioned along said rolls. In case there be an unevenness in the width of the strip as it passes the rollers 51 and 52 the latter will tilt Said rollers have peripheral run .t-AI

around the axis 56 in such a way (and equally) as to relieve strains or pressure and to continue to guide the strip.

Figs. 13, 14 and 15 illustrate a modification in the guiding means for the strip, wherein grooved blocks 51 and 52' are carried by the pivots 53 and 54 to engage the facets of the strip instead of the rollers 51 and 52. The, grooved blocks can rotate or rock on the pivots 53 and 54 to accommodate different widths of strip 2, and the spring pressure on arm 55 will relieve the pressure of the blocks against the strip as may be required.

In accordance with the construction described a metal strip may be continuously propelled while its edges are being sharpened, the devices described serving to guide the strip in such a way as to keep it properly pos1- tioned and aligned with respect'to the sharpening devices in such a manner that the sharpened edges of the strip will not contact with any of the guiding means or other parts of the machine. After the strip has been sharpened it may be cut into suitable lengths for desired purposes, such as for safety razor blades. Where the strip is to be sharpened along one edge only one set of grinding and finishing wheels or disks, such as 3, 4 and 26, 26 may be used alone.

The strip 2 to be sharpened is placed in the guiding means and fitted between the feeding roll 45, 46, in position to be operated upon by the grinding and finishing disks, with the upper unground edge of the strip against the guide block 16, Fig. 4. As the strip is propelled, toward the left in Fig. 1., the grinding disks 3 and 4 will rough-grind the lower edge portions of the strip, producing beveled edges or facets thereon, and such ground edge portions of the strip will travel through the groove 20 of the guide block 19, with the facets of the strip guided by said block but with the ground edge of the strip out of contact with said block, and the grinding disks 7 and 8 Will grind the upper edge portionof the strip, producing beveled edges or facets thereon. As the ground edge portions of the strip travel past the sharpening or honing disks 26 and 26 said edge portions are guided by the grooved rollers 21, 21 and 37, 37, whereby the strip is supported and guided with the facets of the strip engaged by the rollers but with the cutting edges of the strip out of engagement with the rollers. Said rollers thus guide the strip for the operation on the ground edge portions of the honing disks 26 and 26 and resist lateral thrust or pressure of the latter on the strip. Since the rollers 21 and 21' are inovably supported by the arms 23 and 2.3 the rollers 21 and 21' may move and are operative in the direction of the plane of'the strip edgewise to accommodate differences in the width of the strip. After the strip has been sharpened and honed to the desired keen edge the strip is further guided by the rollers 51 and 52, the facets of contact with said rollers so as not to dull said edges. Since the rollers'51 and 52 are keencutting edge may be produced on the strip suitable for razor blades and other uses.

Changes may bemade in the details of construction and arrangement of parts described and illustrated without departing from'the scope of the appended claims.

Having now described my invention what I claim is:

- V 1. A metal sharpening machine comprising means to bevel and sharpen an edge'portion of'a' strip providing facets thereon, means to propel said strip, a sharpening disk spaced from said v means, a support opposed to said disk, and a guide block carried by the support adjacent to said disk and having'aguiding groove for the facets of the traveling strip, said groove being narrower than the thickness of the strip with the edgeportions of the groove in position toengage said facets of the sharpened portioned of the strip to resist thrusts of the disk against an opposite edgeportion of the strip, the groovebeing of sufficient depth to prevent the blockfroni engaging said sharpened edge of the strip.

'- 2. A metal sharpening machine comprising sharpenlng means for a strip, a grooved roller opposed to sald means to engage the facet portions of the strip to resist thrusts of the sharpening means against an opposite portionv of the strip without engaging the sharpened edge thereof, means to propel the strip along the groove of the roller, and'means rotativ ely supporting said roller.

3. A machine asset forth in claim 2 in which the supporting means for the roller includes a block pivotally supported for selfadjusting the position of the roller angularly with respect to the plane of the strip.

4. A metal sharpening machine compris ing a sharpening disk, a block opposed to the disk, and a guiding plate carried by the block and having a space therebetween for the strip means to propel the strip, and a grooved roller for the strip, said roller being pivotal supported between the block and the guidthe strip being guided the rollers with the sharpened cutting edges of the strip out of mg plate to resist thrust of the disk without engaging the sharpened edge of thestrip.

5. A machine as set forth in claim'4 in which theblock is pivotally supported for angular adjustment with respect to the plane of the strip.- I

6. A..metal sharpening machine comprising a sharpening disk, a block opposed thereto, a guide for a strip carried by the block 'and having a space'therebetween for the strip opposing a mid-portion of the disk, grooved guiding rollers for the strip carried in alignment on opposite sides of said guide and disk,

means to propel the strip, and means to retain the block opposed to the disk.

7. A machine as set forth in claim 6 in which the block is pivotally carried for laterally angular adjustment with respect to the 1 plane of the disk. 7 i

8. A machine as set forth in claim 6 in which the block is pivotally carried, said .disk, block and strip-guiding means being maintained in operative alignment with respect to one another in all positions of the block.

9. A metal sharpening machine comprising means to sharpen edge portions of a 7 metal strip, means to propel the strip along the machine, grooved guiding means for the sharpened edge portions of the stripe located along its opposite edge portions, and a pivotally supported arm carrying said guiding means, each of said guiding means being piv V otally supported by said arm on opposite sides of the pivot of the arm to permit the guiding means to press equally on the edge portions of the strip in different positions of the arm.

10. A metal sharpening machine comprising a sharpening disk, means to propel a V strip along the disk, resiliently operative grooved rolls along one edge portion of the strip adjacent to and on opposite sides of the axis of the disk to resist thrust of the disk Without engaging the sharpened edge of the strip, and grooved rollers for the opposite edge portion of the strip located in opposition to the disk, said rollers being adjacent to and on opposite sides of the axis of the disk to resist thrust of the disk without engaging V the sharpened edge of the strip, the groves of said rolls and rollers being of sufiicient depth to prevent the sharpened edges of the strip from engaging said rolls and rollers.

11. A metal sharpening machine comprising means to sharpen a metal strip, means to propel the strip along the machine, grooved guiding means for the sharpened edge portions of the strip located along its opposite edge portions, a pivotally supported arm carrying said guidingmeans, and a spring operative with said arm to resiliently keep the guiding means in engagement with the strip,

' the guiding means including grooved rollers, .each of said rollers being pivotally carried by the arm on opposite sides of the strip.

12. A machine as set forth in claim 11 in which the axis of each roller is at an equal distance from the pivot of the arm to permit the rollers to press equally on the strip in dif ferent positions of the arm.

HENRY J. GAISMAN. 

